FLT3 and acute myeloid leukemia: We examined FLT3 levels in all of the human AML lines used for our study (Figure [Link], [Link], [Link], [Link]), and we observed variable expression of FLT3, ranging from no detectable FLT3 protein expression in HL60 cells to high expression in cell lines such as SKNO‐1‐luc+ and OCI‐AML2 (highest FLT3 expression was observed in FLT3‐ITD–positive MOLM14 cells).